Ethyl 3-amino-2-(difluoromethyl)-4-nitropyridine-5-carboxylate
Methyl 3-amino-2-(difluoromethyl)-5-nitropyridine-4-carboxylate
2-Amino-3-(chloromethyl)-4-(difluoromethyl)-5-(trifluoromethyl)pyridine
Ethyl 6-amino-2-(difluoromethyl)-4-nitropyridine-3-carboxylate